What Is a Recirculating Rangehood and When Does It Make Sense?

When people are looking at rangehoods, they typically encounter two main types: ducted rangehoods that vent cooking fumes directly outside, and recirculating rangehoods (also called ductless or filterless rangehoods) that filter the air and return it to the kitchen. This distinction matters enormously for performance and installation, and it's one of the most important decisions to understand before buying.

How Ducted Rangehoods Work

A ducted rangehood extracts air, cooking fumes, steam, and grease from the kitchen through a duct (usually stainless steel pipe, flexible hose, or rigid ducting) and vents it directly outside the home — through the ceiling, into the roof space and out through a vent, or directly through an exterior wall.

Ducted extraction is the most effective method because it removes everything — moisture, heat, grease particles, and odours — from the home entirely. The extraction efficiency is higher, and there are no filters to replace (only baffle filters to clean, which last the life of the rangehood).

How Recirculating Rangehoods Work

A recirculating rangehood draws air through a series of filters to remove grease and odours, then returns the filtered air back into the kitchen. This requires:

• Baffle or mesh filters: Metal filters that capture grease particles
• Carbon/charcoal filters: Activated carbon that absorbs cooking odours

The result is that some of the grease and odour is removed from the air, but moisture (steam) and heat are returned to the kitchen. Carbon filters need replacement every 3–6 months depending on use, adding ongoing cost.

Performance: Ducted Wins Significantly

Ducted rangehoods are genuinely more effective than recirculating models for the same power output. If you're doing heavy cooking — frying, wok cooking, grilling, baking — a ducted rangehood will keep your kitchen significantly cleaner and more comfortable.

For light to moderate cooking (simmering, pan cooking, light frying), a good recirculating rangehood can be adequate, though it will never match a ducted equivalent.

When Recirculating Makes Sense

Despite the performance disadvantage, recirculating rangehoods are the right choice in several common situations:

• Apartments where ducting is not permitted: Many strata buildings don't allow external penetrations or duct work through ceilings. In these cases, recirculating is often the only option short of a window-vented solution.
• Kitchens on internal walls: When the rangehood is on a wall that doesn't have external access and running ducting would be prohibitively expensive.
• Rental properties: Where structural changes aren't allowed by the landlord.
• Island rangehoods in apartments: Island installations typically require ceiling ducting, which isn't feasible in many apartments.

Recirculating Rangehood Maintenance

The key ongoing maintenance for recirculating rangehoods is carbon filter replacement. These filters lose their odour-absorbing capacity over time (typically 3–6 months of regular use) and need replacement. Some models use activated carbon pellets that can be regenerated in the oven; most use sealed cartridges that must be replaced.

Budget approximately $30–$80 per year for replacement filters depending on the model and how often you cook.

Our Recommendation

Always choose ducted if you can — it's more effective and has lower running costs (no filter replacement). Choose recirculating only when ducting is genuinely not possible. When you do choose recirculating, buy the most powerful model you can in your budget, as higher airflow through the carbon filters compensates partially for the inherent efficiency difference.

Browse Our Rangehood Range

Oceania Appliances stocks both ducted and recirculating rangehoods across a range of styles, sizes, and price points. Visit our showroom at 2/14 Centre Place, Wetherill Park, open 7 days, 10 am to 8 pm.